1 /*
2 * efs_fs_i.h
3 *
4 * Copyright (c) 1999 Al Smith
5 *
6 * Portions derived from IRIX header files (c) 1988 Silicon Graphics
7 */
8
9 #ifndef __EFS_FS_I_H__
10 #define __EFS_FS_I_H__
11
12 typedef int32_t efs_block_t;
13 typedef uint32_t efs_ino_t;
14
15 #define EFS_DIRECTEXTENTS 12
16
17 /*
18 * layout of an extent, in memory and on disk. 8 bytes exactly.
19 */
20 typedef union extent_u {
21 unsigned char raw[8];
22 struct extent_s {
23 unsigned int ex_magic:8; /* magic # (zero) */
24 unsigned int ex_bn:24; /* basic block */
25 unsigned int ex_length:8; /* numblocks in this extent */
26 unsigned int ex_offset:24; /* logical offset into file */
27 } cooked;
28 } efs_extent;
29
30 typedef struct edevs {
31 short odev;
32 unsigned int ndev;
33 } efs_devs;
34
35 /*
36 * extent based filesystem inode as it appears on disk. The efs inode
37 * is exactly 128 bytes long.
38 */
39 struct efs_dinode {
40 u_short di_mode; /* mode and type of file */
41 short di_nlink; /* number of links to file */
42 u_short di_uid; /* owner's user id */
43 u_short di_gid; /* owner's group id */
44 int32_t di_size; /* number of bytes in file */
45 int32_t di_atime; /* time last accessed */
46 int32_t di_mtime; /* time last modified */
47 int32_t di_ctime; /* time created */
48 uint32_t di_gen; /* generation number */
49 short di_numextents; /* # of extents */
50 u_char di_version; /* version of inode */
51 u_char di_spare; /* spare - used by AFS */
52 union di_addr {
53 efs_extent di_extents[EFS_DIRECTEXTENTS];
54 efs_devs di_dev; /* device for IFCHR/IFBLK */
55 } di_u;
56 };
57
58 /* efs inode storage in memory */
59 struct efs_inode_info {
60 int numextents;
61 int lastextent;
62
63 efs_extent extents[EFS_DIRECTEXTENTS];
64 };
65
66 #endif /* __EFS_FS_I_H__ */
67
68
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